Characterization of a dual band metasurface antenna with broadside and isoflux circularly polarized radiation patterns

Abstract

In this paper, we present the theoretical considerations for the implementation of a single layer anisotropic metasurface (MTS) antenna capable to provide different circularly polarized radiation patterns at two frequencies at Ku band (13.5GHz and 16GHz). Circular metallic subwavelength patches with a groove through the diameter are employed to synthesize the proposed MTS configuration. At lower band broadside radiation with a maximum directivity of 26.5dBs is obtained, with 28dBs cross polar field component. At higher band, isoflux-shaped radiation pattern with a drop-off angle around 33° and 10dBs cross polar field is obtained.